RX100, RX120, RX120-2S, RX120-2S V2 frame kit with preassembled tail.

According to the numerous requests of all comers, the models of the three frames RX100, RX120 and RX120-2S with preassembled tail will be available.

In the future, I hope to expand the model range to larger models, but for now I'll tell you more about the models mentioned above.

RX100

The kit consists of an assembled frame, with installed skids, a tail motor and all the mechanics of the tail rotor. The kit also includes a spare tail hub, a tail fin and a servo holder. In addition to the spare parts in the kit there is a 1 mm diameter carbon rod, it can be glued into the frame, into a special hole, near the main engine, to protect the canopy from the engine.

- Main shaft with snap ring. The shaft diameter 2.5mm is 52-53mm long. Suitable main shaft from the helicopter K110 or V977, but with a slight modification. I recommend using a carbon core shaft, slightly shortening it. https://www.banggood.com/WLtoys-V966...r_warehouse=CN Or make the shaft itself from the carbon rod.

The drive shaft of the tail rotor of this model does not have a central sleeve inside the tail boom.
Skis in this model - it is shortened to 4mm skis from the helicopter K110 or V977.
If you need to replace the skis, you will have to make them yourself.

This model uses the maingear for 61 teeth from the Walkera Mini CP helicopter.
This gear is quite difficult to find on sale, so if desired, two versions of this frame will be available.
The first option for a maingear of 61 teeth from a helicopter Walkera Mini CP

The second option is a maingear of 64 teeth from a helicopter K110 or V977.

RX120

The kit consists of an assembled frame, with installed skids, a tail motor and all the mechanics of the tail rotor. The kit also includes a spare tail hub, a tail fin and a servo holder. In addition to the spare parts in the kit there is a 1 mm diameter carbon rod, It can be glued into the frame, into a special hole, near the main engine, to protect the canopy from the engine.

- Main shaft with snap ring. The shaft diameter 2.5mm is 52-53mm long. Suitable main shaft from the helicopter K110 or V977, but with a slight modification. I recommend using a carbon core shaft, slightly shortening it. https://www.banggood.com/WLtoys-V966...r_warehouse=CN Or make the shaft itself from the carbon rod.

The drive shaft of the tail rotor of this model does have a central brass sleeve inside the tail boom.
The sleeve is installed in a boom with a pull.

RX120-2S

The kit consists of an assembled frame, with installed skids, a tail motor and all the mechanics of the tail rotor. The kit also includes a spare tail hub, a tail fin and a servo holder. In addition to the spare parts in the kit there is a 1 mm diameter carbon rod, it can be glued into the frame, into a special hole, near the main engine, to protect the canopy from the engine.

- Main shaft with snap ring. The shaft diameter 2.5mm is 52-53mm long. Suitable main shaft from the helicopter K110 or V977, but with a slight modification. I recommend using a carbon core shaft, slightly shortening it. https://www.banggood.com/WLtoys-V966...r_warehouse=CN Or make the shaft itself from the carbon rod.

The drive shaft of the tail rotor of this model does have a central brass sleeve inside the tail boom.
The sleeve is installed in a boom with a pull.

The helicopter based on this frame is designed for operation by the flybarless system 150GRS Flybarless System Set.
This flight controller has excellent characteristics and allows you to configure flight parameters through a mobile application.
However, there are nuances of the operation by this system, which depend directly on the mechanical part of the helicopter.
This system is designed to work with the mechanics of the helicopter Align 150X. The mechanics of the helicopter Align 150 X has other gear ratios, compared with the mechanics of helicopters K110 / V977. Therefore, it is impossible to use the hub, swash plate and main rotor grips from the helicopters K110 / V977, without changes. It is necessary to assemble the mechanics of the helicopter from parts of different models.
The main problem is the insufficient deviation angles of the standard servo drives 5330, when using the 150GRS. Therefore, it is necessary to increase the gear ratio of mechanics. To do this, instead of the rotor grips from the helicopter K110/V977, you must use the DFC rotor grips from the helicopter K 123/ K 124 or V931. These rotor grips have a shorter lever, and accordingly an increased gear ratio.

When using the DFC rotor grips, you must remove the guide link from the hub because there will be no need in these guides and they will interfere with the normal operation of the rotor grips. The swash plate can be left without changes. To increase more the total and cyclic pitch you can lengthen the levers of the servos.

Important features for all models.

For correct operation of the mechanics of the main rotor, you have to shorten the length of the grip links coming from the servos to the swashplate.
The total length of the grip links should be 20.5mm + \ - 0.5mm.

RX120-2S V2

The kit consists of an assembled frame, with installed skids, a tail motor and all the mechanics of the tail rotor. The kit also includes a spare tail hub, a tail fin and a servo holder. In addition to the spare parts in the kit there is a 1 mm diameter carbon rod, it can be glued into the frame, into a special hole, near the main engine, to protect the canopy from the engine.

- Main shaft with snap ring. The shaft diameter 2.5mm is 52-53mm long. Suitable main shaft from the helicopter K110 or V977, but with a slight modification. I recommend using a carbon core shaft, slightly shortening it. https://www.banggood.com/WLtoys-V966...r_warehouse=CN Or make the shaft itself from the carbon rod.